"Patina" The 1973 CB175 Cafe Racer

Re: "Patina" The 1973 CB175 Cafe Racer


cafe mike said:
When looking at the coil. Put the positive on the left side. That's what they say is positive. And also once again make sure your getting 12v+ to coil with key on/off (switch in your case)
yep positive is the left side of the coil with the two wire spark plug holes at the bottom.


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Re: "Patina" The 1973 CB175 Cafe Racer


Texasstar said:
8uzy3ebu.jpg
this is what we are getting with non resistor caps through the plug wires.


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I'm using the 20k setting and getting the exact same thing through my wires without the caps, or through the coil.
 
Re: "Patina" The 1973 CB175 Cafe Racer

This is our reading measuring through the caps with everything connected through the coil


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Re: "Patina" The 1973 CB175 Cafe Racer


Texasstar said:
This is our reading measuring through the caps with everything connected through the coil


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Right. I don't have that. I have discontinuity in that circuit. I'm trying to figure out why.
 
Re: "Patina" The 1973 CB175 Cafe Racer


1sttimer said:
Right. I don't have that. I have discontinuity in that circuit. I'm trying to figure out why.
i know I am just messing with you.


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Re: "Patina" The 1973 CB175 Cafe Racer

I am thinking that the wire got pushed down when you screwed in the cap. Let's expose the wire on the cap side and screw it in barely


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Re: "Patina" The 1973 CB175 Cafe Racer


Texasstar said:
I am thinking that the wire got pushed down when you screwed in the cap. Let's expose the wire on the cap side and screw it in barely


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Oh ha ha. I think this is the biggest head scratcher I've had so far with this bike. Looking back I think I actually tried that and only barely stuck the screw into the copper and still had issues.

Since I have continuity to the ends of the wire, you think it has something to do with the cap area?
 
Re: "Patina" The 1973 CB175 Cafe Racer


1sttimer said:
Oh ha ha. I think this is the biggest head scratcher I've had so far with this bike. Looking back I think I actually tried that and only barely stuck the screw into the copper and still had issues.

Since I have continuity to the ends of the wire, you think it has something to do with the cap area?
yep but for both old caps and new caps not to work I am thinking the copper strands are broken in the wire but when you stick the probe in straight it comes in contact whereas when you screw it in it comes in contact with broken strands...


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Re: "Patina" The 1973 CB175 Cafe Racer

I would expose the copper and touch it to the screw then check the continuity


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Re: "Patina" The 1973 CB175 Cafe Racer


Texasstar said:
I would expose the copper and touch it to the screw then check the continuity


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Ok I'll try that next . Headed out for the night but I'll do that when I get back tomorrow.

Back to your iridium point. In the instructions with the EI it specifically says to replace the stock resistor caps with the ngk 5 kohm ones. What's the relationship between the EI and the cap that would cause for resistor caps to be mandatory?
 
Re: "Patina" The 1973 CB175 Cafe Racer

Iridium plugs are resistor plugs so you don't need resistor caps


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Re: "Patina" The 1973 CB175 Cafe Racer

The other part of your question we will save for the wizard


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Re: "Patina" The 1973 CB175 Cafe Racer

Haha indeed . That's enough typing for today anyway. I do enough of that at work :p I very much appreciate your guys' willingness to help. I'll update soon.
 
Re: "Patina" The 1973 CB175 Cafe Racer

1sttimer said:
I'm honestly not sure where to begin to get a spark out of just the wire without the resistor cap to connect the spark plug. I mean I could wrap the wire around the head of the cap I suppose but I have no idea what that thing is you pictured :/

It's basically a spark plug that clips on to a ground. It's like when your testing for spark and you use your plug and lay it on the motor. It just air gap sparks. Same thing as taking your wire (without the screw on 90 degree boot) you can take that wire and leave an air gap (close as you can without touching) should spark.
 
Re: "Patina" The 1973 CB175 Cafe Racer

Well, this morning I stripped the wire bare at the resistance cap end, touched the bare wire to the cap thread and took a reading of the whole circuit and got no continuity.

Still baffled.
 
Re: "Patina" The 1973 CB175 Cafe Racer

What about on the bare wire with no cap?


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